CN108952895B - Particle catcher regeneration system and method suitable for double-engine road sweeper - Google Patents

Particle catcher regeneration system and method suitable for double-engine road sweeper Download PDF

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Publication number
CN108952895B
CN108952895B CN201811049538.6A CN201811049538A CN108952895B CN 108952895 B CN108952895 B CN 108952895B CN 201811049538 A CN201811049538 A CN 201811049538A CN 108952895 B CN108952895 B CN 108952895B
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China
Prior art keywords
engine
pipe
air
air inlet
inlet pipe
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CN201811049538.6A
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CN108952895A (en
Inventor
赵洋
王正义
许广举
李铭迪
胡焰彬
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Changshu Institute of Technology
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Changshu Institute of Technology
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0233—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles periodically cleaning filter by blowing a gas through the filter in a direction opposite to exhaust flow, e.g. exposing filter to engine air intake
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N11/00—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity
    • F01N11/002—Monitoring or diagnostic devices for exhaust-gas treatment apparatus, e.g. for catalytic activity the diagnostic devices measuring or estimating temperature or pressure in, or downstream of the exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N9/00—Electrical control of exhaust gas treating apparatus
    • F01N9/002—Electrical control of exhaust gas treating apparatus of filter regeneration, e.g. detection of clogging
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B73/00—Combinations of two or more engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/10—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having pivotally-mounted flaps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/0212—Multiple cleaners
    • F02M35/0215—Multiple cleaners arranged in parallel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/024—Air cleaners using filters, e.g. moistened
    • F02M35/02416—Fixing, mounting, supporting or arranging filter elements; Filter element cartridges
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • F02M35/042—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices combined with other devices, e.g. heaters ; for use other than engine air intake cleaning, e.g. air intake filters arranged in the fuel vapour recovery system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/02—Air cleaners
    • F02M35/04—Air cleaners specially arranged with respect to engine, to intake system or specially adapted to vehicle; Mounting thereon ; Combinations with other devices
    • F02M35/044—Special arrangements of cleaners in or with respect to the air intake system, e.g. in the intake plenum, in ducts or with respect to carburettors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
    • F02M35/10255—Arrangements of valves; Multi-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/008—Mounting or arrangement of exhaust sensors in or on exhaust apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/10—Air intakes; Induction systems
    • F02M35/10373—Sensors for intake systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

A particle catcher regeneration system and method suitable for a double-engine road sweeper belong to the technical field of diesel particle catcher blowback regeneration. The method comprises the following steps: s1) the first pressure sensor and the second pressure sensor respectively collect a first engine exhaust back pressure value and a second engine exhaust back pressure value at one end of the particle catcher; s2) judging whether the first engine exhaust back pressure value and the second engine exhaust back pressure value are too high: s21) if the exhaust back pressure value of the first engine is too high and the second engine is in an un-started state, the particle catcher enters a rotary working state, so that the filter bag corresponding to the first exhaust pipe is communicated with the second air inlet pipe; s22) if the exhaust back pressure value of the first engine is too high and the second engine is in a starting state, the particle catcher enters a rotary working state, so that the filter bag corresponding to the first exhaust pipe is communicated with the second air inlet pipe. The advantages are that: simple structure, regeneration efficiency are high, can practice thrift DPF regeneration cost.

Description

Particle catcher regeneration system and method suitable for double-engine road sweeper
Technical Field
The invention belongs to the technical field of diesel engine particle trapping blowback regeneration, and particularly relates to a particle catcher regeneration system and method suitable for a double-engine road sweeper.
Background
The diesel engine is widely applied to road dust collection and cleaning vehicles due to the advantages of high efficiency, good fuel economy and the like, but the diesel engine carried by the road cleaning vehicle works in a low-rotation speed range for a long time, and the particles of the emissions are larger, so that the exhaust pipe of the engine is easy to be blocked, and the environmental problem is caused. In order to solve the above-mentioned problems, a diesel engine is generally provided with a particulate filter (hereinafter, referred to as DPF) mounted on an exhaust pipe of the engine, for trapping and removing particulates contained in combustion exhaust gas discharged from the diesel engine. In the working state that the DPF is empty, as no stored particles are blocked in the DPF, the flow resistance of the waste gas is very low, and the normal operation of the engine is not influenced; with the continuous generation of the particles, the particles trapped in the DPF gradually increase, so that the exhaust resistance of the exhaust gas increases, and the fuel consumption and the power of the engine are affected by the increase of the exhaust back pressure. When the exhaust pipe of the engine is blocked by particles and the performance of the engine is affected, the particles in the DPF must be removed periodically to restore the DPF to the original state, so that the regeneration is realized. Existing regeneration methods can be divided into two types, namely thermal regeneration and catalytic regeneration, however, both methods have defects in practical application. In the thermal regeneration mode, the device is heated locally too much, local melting is easy to cause, the whole structure is complex, and the cost is high; in the catalytic regeneration mode, matched sulfur-free diesel oil is required to be used, so that the method has certain application limitation.
In view of the above prior art, the applicant has devised an advantageous design and the technical solutions described below are created in this context.
Disclosure of Invention
The invention aims at providing a particle catcher regeneration system suitable for a double-engine road sweeper, improving the regeneration working efficiency and saving the maintenance cost.
Another object of the present invention is to provide a method for regenerating a particle catcher suitable for a dual engine road sweeper, which is simple in steps and capable of guaranteeing the full manifestation of the technical effects of the regeneration system of the particle catcher.
The primary task of the present invention is accomplished by a particle catcher regeneration system for a dual-engine road sweeper, comprising a first engine and a second engine, wherein the first engine is provided with a first air inlet pipe and a first air outlet pipe, and the second engine is provided with a second air inlet pipe and a second air outlet pipe, and the particle catcher regeneration system is characterized in that: still include the granule trapper, the granule trapper include support, filtration passageway, constraint area, gear and motor, the quantity of filtration passageway have four, two liang be the diagonal setting, constitute the structure of arranging of article font about the inside of support, be equipped with the filter bag that is used for filtering exhaust gas granule in every filtration passageway, constraint area twine the package in the periphery of four filtration passageways for fastening filtration passageway, gear cover establish in the periphery of four filtration passageways, the motor fix on the support and with the gear engagement transmission, drive four filtration passageways clockwise or anticlockwise rotatory by the gear, correspond to four filtration passageways, first intake pipe and second intake pipe are the diagonal setting with four filtration passageways, first blast pipe and second blast pipe are the diagonal setting, first intake pipe, first blast pipe, second intake pipe and second blast pipe respectively with four filtration passageway's one end intercommunication installation to through four filtration passageways's rotation, make the filtration passageway that originally communicates become with first blast pipe intercommunication, the filtration passageway that communicates with first blast pipe become with first blast pipe, the filtration passageway that communicates with first blast pipe and second intake pipe become with the second intake pipe and communicate with the first intake pipe and change the filtration passageway that the second intake pipe communicates with the first intake pipe and the second intake pipe and the first intake pipe communicates with the second intake pipe and the first intake pipe and the second intake pipe.
In a specific embodiment of the present invention, the first engine further comprises a first intake air pipe, the second engine further comprises a second intake air pipe, the first intake air pipe comprises a first air guiding pipe and a first adapting pipe communicated with the first air guiding pipe, one end of the first air guiding pipe is communicated with the first intake pipe of the first engine, a first air filter is connected in series between the first air filter and the first intake pipe, a first air guiding pipe butterfly valve is arranged between the first air filter and the first intake pipe, a first air flow sensor and a first oxygen concentration sensor are arranged on the first intake pipe and close to the first engine, a first intake pipe butterfly valve is arranged close to the particle catcher, a first pressure sensor is arranged on the first exhaust pipe and close to the particle catcher, the other end of the first air guiding pipe is communicated with an air guiding pipe corresponding to the first intake pipe of the particle catcher, and the first adapting pipe is communicated with a dust collection air flow pipeline of the road sweeper; the second suction airflow inlet pipe comprises a second air guiding pipe and a second matching pipe communicated with the second air guiding pipe, one end of the second air guiding pipe is communicated with a second air inlet pipe of a second engine, a second air filter is connected in series between the second air guiding pipe and the second air inlet pipe, a second air guiding pipe butterfly valve is arranged between the second air filter and the second air inlet pipe, a second air flow sensor and a second oxygen concentration sensor are installed on the second air inlet pipe and close to the second engine, a second air inlet pipe butterfly valve is installed close to the particle catcher, a second pressure sensor is installed on the second exhaust pipe and close to the particle catcher, the other end of the second air guiding pipe is communicated with an outlet pipe of the particle catcher, which corresponds to the second air inlet pipe, and the second matching pipe is communicated with a dust collection airflow pipeline of the road sweeper.
In another specific embodiment of the present invention, the first suction airflow inlet pipe is provided with a first electromagnetic valve on the first adapting pipe; the second suction airflow inlet pipe is provided with a second electromagnetic valve on the second adapting pipe.
In yet another specific embodiment of the present invention, the four filtering channels are rotated by 90 degrees under the driving of the gear.
In yet another specific embodiment of the present invention, a controller is also included and is electrically connected to the motor, the first bleed air pipe butterfly valve, the first intake pipe butterfly valve, the first solenoid valve, the first air flow sensor, the first oxygen concentration sensor, the first pressure sensor, the second bleed air pipe butterfly valve, the second intake pipe butterfly valve, the second solenoid valve, the second air flow sensor, the second oxygen concentration sensor, the second pressure sensor, and the second engine, respectively.
The invention further relates to a method for regenerating a particle catcher of a double-engine road sweeper, which is characterized by comprising the following steps:
s1) in the beginning stage, the first pressure sensor and the second pressure sensor respectively collect a first engine exhaust back pressure value and a second engine exhaust back pressure value at one end of the particle catcher;
s2) when the collected first engine exhaust back pressure value and the second engine exhaust back pressure value reach set values, judging whether the first engine exhaust back pressure value and the second engine exhaust back pressure value are too high or not respectively:
s21) if the exhaust back pressure value of the first engine is too high and the second engine is in a non-starting state, the particle catcher enters a rotary working state, a filter bag corresponding to the first exhaust pipe is communicated with the second air inlet pipe, then the second engine is started, the air inlet flow and the oxygen concentration of the second engine are improved to set values by controlling the opening angle of the second electromagnetic valve, particles in the original first engine exhaust gas in the filter bag are reversely blown into the second engine by the air inlet flow of the second engine, and after the filter bag works for a period of time, the second engine is closed;
s22) if the exhaust back pressure value of the first engine is too high and the second engine is in a starting state, the particle catcher enters a rotary working state, a filter bag corresponding to the first exhaust pipe is communicated with the second air inlet pipe, the air inlet flow and the oxygen concentration of the second engine are improved to set values by controlling the opening angle of the second electromagnetic valve, particles in the original exhaust gas of the first engine in the filter bag are reversely blown into the second engine by the air inlet flow of the second engine, and then the normal working state of the second engine is ensured by increasing or reducing the oil injection quantity of the second engine;
s23) if the exhaust back pressure value of the second engine is too high and the first engine is in a working state, the particle catcher enters a rotary working state, a filter bag corresponding to the second exhaust pipe is communicated with the first air inlet pipe, the air inlet flow and the oxygen concentration of the first engine are improved to set values by adjusting the opening angle of the first electromagnetic valve, particles in the original second engine exhaust gas in the filter bag are reversely blown into the first engine by the air inlet flow of the first engine, and then the normal working state of the first engine is ensured by increasing or reducing the oil injection quantity of the first engine.
Due to the adoption of the structure, compared with the prior art, the invention has the beneficial effects that: the first engine and the second engine share the particle catcher, particles attached to the particle catcher are reversely blown into the first engine and the second engine by utilizing the air inlet flow, DPF regeneration is realized, and in a DPF regeneration mode, a filter bag structure is adopted to filter particles in waste gas, so that the structure is simple, the regeneration efficiency is high, and the DPF regeneration cost can be saved; in the air flow back blowing mode, the dust collection air flow of the road sweeper is introduced through the first air suction pipe and the second air suction pipe, so that the air flow speed of the first air suction pipe and the second air suction pipe is increased, and the back blowing effect on waste gas particles adhered on the filter bag is enhanced; in the aspect of air inflow control, the opening angles of the first electromagnetic valve and the second electromagnetic valve are controlled by monitoring the air flow and the oxygen concentration, so that the air flows entering the first engine and the second engine are more stable, and the normal working state is ensured.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a cross-sectional view at A-A of fig. 1.
Fig. 3 is a cross-sectional view at B-B of fig. 1.
Fig. 4 is a block diagram of electrical connections of a controller according to the present invention.
Fig. 5 is a flow chart of the operation of the particle catcher rotation according to the present invention.
FIG. 6 is a flowchart illustrating the operation of the present invention to perform DPF regeneration.
In the figure: 1. first engine, 11, first intake pipe, 12, first exhaust pipe, 13, first intake air flow pipe, 131, first bleed pipe, 132, first adapter pipe, 133, first solenoid valve, 14, first air filter, 15, first bleed pipe butterfly valve, 16, first air flow sensor, 17, first oxygen concentration sensor, 18, first intake pipe butterfly valve, 19, first pressure sensor; 2. the second engine, 21, second intake pipe, 22, second exhaust pipe, 23, second intake airflow pipe, 231, second bleed pipe, 232, second adapter pipe, 233, second solenoid valve, 24, second air filter, 25, second bleed pipe butterfly valve, 26, second air flow sensor, 27, second oxygen concentration sensor, 28, second intake pipe butterfly valve, 29, second pressure sensor. 3. Particle trap, 31, bracket, 32, filter channel, 321, first air filter bag, 322, second air filter bag, 323, first exhaust filter bag, 324, second exhaust filter bag, 33, tie-down strap, 34, gear, 35, motor, 36, eduction tube.
Detailed Description
In order that the nature and advantages of the invention may be fully understood by the applicant, a detailed description of specific embodiments of the invention will be presented below with reference to the accompanying drawings, but the description of the examples by applicant is not intended to be a limitation, and any variations in form but not substance, according to the inventive concept should be regarded as being within the scope of the invention.
Referring to fig. 1 to 3, a particle catcher regeneration system for a dual engine road sweeper includes a first engine 1, a second engine 2 and a particle catcher 3. The first engine 1 includes a first intake pipe 11, a first exhaust pipe 12, and a first intake air pipe 13, and the second engine 2 includes a second intake pipe 21, a second exhaust pipe 22, and a second intake air pipe 23. In the present embodiment, the first engine 1 is defined as a driving engine for supplying driving power to the sweeper, and the second engine 2 is defined as a cleaning engine for supplying dust-sucking power to the sweeper. The particle catcher 3 comprises a bracket 31, a filtering channel 32, a binding belt 33, a gear 34 and a motor 35. The number of the filtering channels 32 is four, the filtering channels are diagonally arranged in pairs, an up-down delta-shaped arrangement structure is formed in the bracket 31, and each filtering channel 32 is internally provided with a filtering bag for filtering waste gas particles. The binding belt 33 is wrapped around the periphery of the four filter channels 32 and used for fastening the filter channels 32, and the gear 34 is sleeved on the periphery of the four filter channels 32. The motor 35 is fixed on the bracket 31 and is meshed with the gear 34 for transmission, and the gear 34 drives the four filtering channels 32 to rotate clockwise or anticlockwise at an amplitude of 90 degrees each time. The first air inlet pipe 11 and the second air inlet pipe 21 are diagonally arranged, the first air outlet pipe 12 and the second air outlet pipe 22 are diagonally arranged, the first air inlet pipe 11, the first air outlet pipe 12, the second air inlet pipe 21 and the second air outlet pipe 22 are respectively communicated with one ends of the four air inlet pipes 32, the air inlet pipes 11 and the air outlet pipes 12 are communicated with the first air inlet pipe 12, the air inlet pipes 12 and the air outlet pipes 12 are communicated with the second air inlet pipe 21, the air inlet pipes 21 and the air outlet pipes 22 are communicated with the second air inlet pipe 22, and the air inlet pipes 11 are communicated with the air inlet pipes 32. The four filter channels 32 are each connected at the other end to an outlet tube 36.
Further, the first suction airstream inlet pipe 13 includes a first airstream suction duct 131 and a first adapter 132 communicating with the first airstream suction duct 131. One end of the first air bleed pipe 131 is communicated with the first air inlet pipe 11 of the first engine 1, a first air filter 14 is connected in series between the first air bleed pipe 131 and the first air inlet pipe 11, a first air bleed pipe butterfly valve 15 is arranged between the first air filter 14 and the first air inlet pipe 11, a first air flow sensor 16 and a first oxygen concentration sensor 17 are arranged on the first air inlet pipe 11 and close to the first engine 1, and a first air inlet pipe butterfly valve 18 is arranged close to the particle catcher 3. A first pressure sensor 19 is installed on the first exhaust pipe 12 and between the first intake pipe butterfly valve 18 and the particle catcher 3, and the other end of the first exhaust pipe 131 is communicated with an outlet pipe 36 of the particle catcher 3 corresponding to the first intake pipe 11. The first adapter tube 132 is communicated with the dust-collecting airflow pipeline of the road sweeper, and a first electromagnetic valve 133 is arranged on the first adapter tube. The second intake air flow pipe 23 includes a second air intake pipe 231 and a second adapting pipe 232 connected to the second air intake pipe 231, one end of the second air intake pipe 231 is connected to the second air intake pipe 21 of the second engine 2, a second air filter 24 is connected in series between the second air intake pipe 231 and the second air intake pipe 21, a second air intake pipe butterfly valve 25 is disposed between the second air filter 24 and the second air intake pipe 21, a second air flow sensor 26 and a second oxygen concentration sensor 27 are mounted on the second air intake pipe 21 and near the second engine 2, a second intake pipe butterfly valve 28 is mounted near the particle catcher 3, a second pressure sensor 29 is mounted on the second exhaust pipe 22 and between the second intake pipe butterfly valve 28 and the particle catcher 3, and the other end of the second air intake pipe 231 is connected to an outlet pipe 36 of the particle catcher 3 corresponding to the second air intake pipe 21. The second adapter 232 is communicated with the dust-collecting airflow pipeline of the road sweeper, and a second electromagnetic valve 233 is arranged on the second adapter.
With continued reference to fig. 2 and 3, specifically, the filter bags in the four filter channels 32 are respectively defined as a first air filter bag 321, a second air filter bag 322, a first exhaust gas filter bag 323 and a second exhaust gas filter bag 324, and, as seen from the direction of the first engine 1 and the second engine 2, the first air filter bag 321, the first exhaust gas filter bag 323, the second air filter bag 322 and the second exhaust gas filter bag 324 are sequentially arranged in a clockwise direction, and the adjacent two are different by 90 degrees. In the present embodiment, the particle catcher 3 is set to rotate the four filter passages 32 by 90 degrees in a clockwise direction every time it rotates. The first intake pipe 11, the first exhaust pipe 12, the second intake pipe 21, and the second exhaust pipe 22 are also arranged in this order in the clockwise direction as viewed from the direction of the first engine 1 and the second engine 2, corresponding to the four filter passages 32, to form an up-down inverted-v arrangement. In the original state, the first air filter bag 321 is communicated with the first air inlet pipe 11, the second air filter bag 322 is communicated with the second air inlet pipe 21, the first exhaust gas filter bag 323 is communicated with the first exhaust pipe 12, and the second exhaust gas filter bag 324 is communicated with the second exhaust pipe 22. When the particle trap 3 rotates once, the first air intake pipe 11 becomes communicated with the second exhaust gas filter bag 324, exhaust gas particles of the second engine 2 are reversely blown into the combustion chamber of the first engine 1, the first air exhaust pipe 12 becomes communicated with the first air filter bag 321, the first air filter bag 321 filters particulate matters in exhaust gas discharged from the first engine 1, the second air intake pipe 21 becomes communicated with the first exhaust gas filter bag 323, exhaust gas particles of the first engine 1 reversely blow into the combustion chamber of the second engine 2, the second air exhaust pipe 22 becomes communicated with the second air filter bag 322, and the second air filter bag 322 filters particulate matters in exhaust gas discharged from the second engine 2, thereby achieving DPF regeneration. The first and second intake air pipes 13 and 23 serve to guide the inhaled air flow into the particle catcher 3 or into the first and second air filters 14 and 24, increase the circulation speed of the air in the first and second intake pipes 11 and 21, and enhance the blowback effect of the blowback air flow on the exhaust gas particles adhering to the filter bag, thereby enabling to improve the regeneration efficiency.
Referring to fig. 4, the present invention further includes a controller, and in this embodiment, the controller uses a MC9S08GB60A single-chip microcomputer of freescan company. The controller is electrically connected to the motor 35, the first bleed air pipe butterfly valve 15, the first intake pipe butterfly valve 18, the first solenoid valve 133, the first air flow sensor 16, the first oxygen concentration sensor 17, the first pressure sensor 19, the second bleed air pipe butterfly valve 25, the second intake pipe butterfly valve 28, the second solenoid valve 233, the second air flow sensor 26, the second oxygen concentration sensor 27, the second pressure sensor 29, and the second engine 2, respectively. The controller is also electrically connected to the second engine 2 for controlling the start or shut-down of the second engine 2. The first air flow sensor 16 and the second air flow sensor 26 are used for measuring the air flow in the corresponding pipelines, and the first oxygen concentration sensor 17 and the first oxygen concentration sensor 27 are used for measuring the oxygen concentration in the corresponding pipelines. The controller controls the opening angles of the first solenoid valve 133 and the second solenoid valve 233 by a closed-loop control method based on the values monitored by the first air flow sensor 16, the second air flow sensor 26, the first oxygen concentration sensor 17, and the first oxygen concentration sensor 27, and comparing with the set values. When the air flow and the oxygen concentration are smaller than the set values, the opening angles of the first electromagnetic valve 133 and the second electromagnetic valve 233 are increased, so that the air flow rate in the corresponding pipeline is increased; when the air flow and the oxygen concentration are greater than the set values, the opening angles of the first solenoid valve 133 and the second solenoid valve 233 are reduced to reduce the air flow rate in the corresponding duct. The first pressure sensor 19 and the second pressure sensor 29 are used for monitoring the exhaust back pressure value in the corresponding pipelines. The controller compares the first engine exhaust back pressure value of the first engine 1 and the second engine exhaust back pressure value of the second engine 2 with the set value to determine whether the regeneration operation of the particulate trap 3 is required. When the first engine exhaust back pressure value and the second engine exhaust back pressure value reach the set values, the controller transmits signals to the motor 35, and the motor 35 controls the filter bag in the particle catcher 3 to rotate 90 degrees in the clockwise direction, so that DPF regeneration is realized.
Referring to fig. 5, when the particle catcher 3 is in a rotating state, the first air-entraining butterfly valve 15 and the second air-entraining butterfly valve 25 are opened first, in order to make the air flow into the first engine 1 and the second engine 2 smooth, after a time delay, the first air-intake butterfly valve 18 and the second air-intake butterfly valve 28 are closed again, so that the external air is filtered by the original particle catcher 3 and introduced into the first engine 1 and the second engine 2, and is filtered by the first air filter 14 and the second air filter 24 and then introduced into the first engine 1 and the second engine 2, respectively, and then the particle catcher 3 is rotated clockwise by 90 degrees, so that the first air filter bag 321 and the first exhaust gas filter bag 323 finish the conversion, and the second air filter bag 322 and the second exhaust gas filter bag 324 finish the conversion. Then, the first intake pipe butterfly valve 18 and the second intake pipe butterfly valve 28 are opened, and similarly, after a lapse of time to smooth the flow of air into the first engine 1 and the second engine 2, the first bleed pipe butterfly valve 15 and the second bleed pipe butterfly valve 25 are closed, and the air is filtered by the first air filter 14 and the second air filter 24 and introduced into the first engine 1 and the second engine 2, and is converted into the particulate trap 3 and introduced into the first engine 1 and the second engine 2.
Referring to fig. 6, the method for regenerating the particle catcher of the dual-engine road sweeper of the invention comprises the following steps:
s1) in the beginning stage, the first pressure sensor 19 and the second pressure sensor 29 respectively collect a first engine exhaust back pressure value and a second engine exhaust back pressure value at one end of the particle catcher 3;
s2) when the collected first engine exhaust back pressure value and the second engine exhaust back pressure value reach set values, judging whether the first engine exhaust back pressure value and the second engine exhaust back pressure value are too high or not respectively:
s21) if the exhaust back pressure value of the first engine is too high and the second engine 2 is in an un-started state, the particle catcher 3 enters a rotary working state to complete internal filter bag conversion, a filter bag corresponding to the first exhaust pipe 12, namely, a first exhaust filter bag 323 is communicated with the second air inlet pipe 21, the second engine 2 is started, the opening angle of the second electromagnetic valve 233 is controlled, the air inlet flow and the oxygen concentration of the second engine 2 are improved to set values, particles in the original exhaust gas of the first engine 1 in the filter bag are reversely blown into the second engine 2 by the air inlet flow of the second engine 2, and after a period of working, the second engine 2 is closed;
s22) if the exhaust back pressure value of the first engine is too high and the second engine 2 is in a starting state, the particle catcher 3 enters a rotary working state to complete internal filter bag conversion, a filter bag corresponding to the first exhaust pipe 12, namely, a first exhaust filter bag 323 is communicated with the second air inlet pipe 21, the opening angle of the second electromagnetic valve 233 is controlled, the air inlet flow and the oxygen concentration of the second engine 2 are improved to set values, particles in the original exhaust gas of the first engine 1 in the filter bag are reversely blown into the second engine 2 by the air inlet flow of the second engine 2, and then the normal working state of the second engine 2 is ensured by increasing or reducing the oil injection quantity of the second engine 2;
s23) if the exhaust back pressure value of the second engine is too high and the first engine 1 is in a working state, the particle catcher 3 enters a rotating working state to complete the conversion of the internal filter bag, so that the filter bag corresponding to the second exhaust pipe 22, namely, the second exhaust filter bag 324 is communicated with the first intake pipe 11, the opening angle of the first electromagnetic valve 133 is adjusted, the intake air flow and the oxygen concentration of the first engine 1 are increased to set values, the particles in the original exhaust gas of the second engine 2 in the filter bag are reversely blown into the first engine 1 by the intake air flow of the first engine 1, and then the normal working state of the first engine 1 is ensured by increasing or reducing the oil injection quantity of the first engine 1.
When the first engine exhaust back pressure value and the second engine exhaust back pressure value are too high, the particle catcher 3 rotates normally, and normal operation of the first engine 1 and the second engine 2 is not affected.

Claims (3)

1. The utility model provides a particle catcher regeneration system suitable for two engine road motor sweeper, includes first engine (1) and second engine (2), first engine (1) possess first intake pipe (11) and first blast pipe (12), second engine (2) possess second intake pipe (21) and second blast pipe (22), its characterized in that: the particle catcher (3) comprises a bracket (31), filtering channels (32), binding belts (33), gears (34) and a motor (35), wherein the number of the filtering channels (32) is four, the filtering channels are arranged diagonally, an upper-lower inverted V-shaped arrangement structure is formed in the bracket (31), a filter bag for filtering exhaust particles is arranged in each filtering channel (32), the binding belts (33) are wrapped around the peripheries of the four filtering channels (32) and used for fastening the filtering channels (32), the gears (34) are sleeved on the peripheries of the four filtering channels (32), the motor (35) is fixed on the bracket (31) and meshed with the gears (34) for transmission, the gears (34) drive the four filtering channels (32) to rotate clockwise or anticlockwise, the first air inlet pipe (11) and the second air inlet pipe (21) are arranged diagonally corresponding to the four filtering channels (32), the first air outlet pipe (12) and the second air outlet pipe (22) are arranged diagonally, the first air inlet pipe (12), the second air inlet pipe (11) and the second air inlet pipe (21) are respectively connected with one end of the four filtering channels (32) in a rotary mode, the filter channel (32) which is originally communicated with the first air inlet pipe (11) is communicated with the first air outlet pipe (12), the filter channel (32) which is originally communicated with the first air outlet pipe (12) is communicated with the second air inlet pipe (21), the filter channel which is originally communicated with the second air inlet pipe (21) is communicated with the second air outlet pipe (22), the filter channel (32) which is originally communicated with the second air outlet pipe (22) is communicated with the first air inlet pipe (11), and the other ends of the four filter channels (32) are communicated with the eduction pipes (36); the first engine (1) is further provided with a first suction airflow inlet pipe (13), the second engine (2) is further provided with a second suction airflow inlet pipe (23), the first suction airflow inlet pipe (13) comprises a first air suction pipe (131) and a first adapting pipe (132) communicated with the first air suction pipe (131), one end of the first air suction pipe (131) is communicated with the first air inlet pipe (11) of the first engine (1), a first air filter (14) is connected in series between the first air filter (14) and the first air inlet pipe (11), a first air-guiding pipe butterfly valve (15) is arranged between the first air filter (14) and the first air inlet pipe (11), a first air flow sensor (16) and a first oxygen concentration sensor (17) are arranged on the first air inlet pipe (11) and close to the first engine (1), a first air inlet pipe valve (18) is arranged close to the particle catcher (3), a first pressure sensor (19) is arranged on the first air exhaust pipe (12) and is communicated with the first adapting pipe (36) of the first air suction pipe (11) correspondingly; the second suction airflow inlet pipe (23) comprises a second air suction pipe (231) and a second adapting pipe (232) communicated with the second air suction pipe (231), one end of the second air suction pipe (231) is communicated with a second air inlet pipe (21) of the second engine (2), a second air filter (24) is connected in series between the second air suction pipe and the second air inlet pipe, a second air suction pipe butterfly valve (25) is arranged between the second air filter (24) and the second air inlet pipe (21), a second air flow sensor (26) and a second oxygen concentration sensor (27) are arranged on the second air inlet pipe (21) and close to the second engine (2), a second air inlet pipe butterfly valve (28) is arranged close to the particle catcher (3), a second pressure sensor (29) is arranged on the second air exhaust pipe (22) and close to the particle catcher (3), the other end of the second air suction pipe (231) is communicated with an eduction pipe (36) corresponding to the second air inlet pipe (21), and the second adapting pipe (232) is communicated with a dust collection vehicle; the first suction airflow inlet pipe (13) is provided with a first electromagnetic valve (133) on the first connecting pipe (132); the second suction airflow inlet pipe (23) is provided with a second electromagnetic valve (233) on a second connecting pipe (232); the four filtering channels (32) are driven by the gears (34) to rotate in an amplitude of 90 degrees.
2. The particulate trap regeneration system suitable for a dual engine road sweeper of claim 1 further comprising a controller electrically connected to the motor (35), the first bleed air pipe butterfly valve (15), the first intake pipe butterfly valve (18), the first solenoid valve (133), the first air flow sensor (16), the first oxygen concentration sensor (17), the first pressure sensor (19), the second bleed air pipe butterfly valve (25), the second intake pipe butterfly valve (28), the second solenoid valve (233), the second air flow sensor (26), the second oxygen concentration sensor (27), the second pressure sensor (29) and the second engine (2), respectively.
3. A regeneration method of a particle trap regeneration system for a dual engine road sweeper as claimed in claim 1 or 2, comprising the steps of:
s1) in the beginning stage, the first pressure sensor (19) and the second pressure sensor (29) respectively collect a first engine exhaust back pressure value and a second engine exhaust back pressure value at one end of the particle catcher (3);
s2) when the collected first engine exhaust back pressure value and the second engine exhaust back pressure value reach set values, judging whether the first engine exhaust back pressure value and the second engine exhaust back pressure value are too high or not respectively:
s21) if the exhaust back pressure value of the first engine is too high and the second engine (2) is in an un-started state, the particle catcher (3) enters a rotary working state, a filter bag corresponding to the first exhaust pipe (12) is communicated with the second air inlet pipe (21), then the second engine (2) is started, the air inlet flow and the oxygen concentration of the second engine (2) are improved to set values by controlling the opening angle of the second electromagnetic valve (233), particles in the waste gas of the original first engine (1) in the filter bag are reversely blown into the second engine (2) by the air inlet flow of the second engine (2), and after a period of working, the second engine (2) is closed;
s22) if the exhaust back pressure value of the first engine is too high and the second engine (2) is in a starting state, the particle catcher (3) enters a rotary working state, a filter bag corresponding to the first exhaust pipe (12) is communicated with the second air inlet pipe (21), the air inlet flow and the oxygen concentration of the second engine (2) are improved to set values by controlling the opening angle of the second electromagnetic valve (233), particles in the exhaust gas of the original first engine (1) in the filter bag are reversely blown into the second engine (2) by the air inlet flow of the second engine (2), and then the normal working state of the second engine (2) is ensured by increasing or reducing the oil injection quantity of the second engine (2);
s23) if the exhaust back pressure value of the second engine is too high and the first engine (1) is in a working state, the particle catcher (3) enters a rotary working state, a filter bag corresponding to the second exhaust pipe (22) is communicated with the first air inlet pipe (11), the air inlet flow and the oxygen concentration of the first engine (1) are improved to set values by adjusting the opening angle of the first electromagnetic valve (133), particles in the exhaust gas of the original second engine (2) in the filter bag are reversely blown into the first engine (1) by the air inlet flow of the first engine (1), and then the normal working state of the first engine (1) is ensured by increasing or reducing the oil injection quantity of the first engine (1).
CN201811049538.6A 2018-09-10 2018-09-10 Particle catcher regeneration system and method suitable for double-engine road sweeper Active CN108952895B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0749023A (en) * 1993-08-06 1995-02-21 Nippondenso Co Ltd Exhaust emission control device for diesel engine
CN102269035A (en) * 2011-06-22 2011-12-07 安徽艾可蓝节能环保科技有限公司 Fuel oil combustion control system for concurrent heating regeneration system of diesel engine tail gas particle catcher

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0749023A (en) * 1993-08-06 1995-02-21 Nippondenso Co Ltd Exhaust emission control device for diesel engine
CN102269035A (en) * 2011-06-22 2011-12-07 安徽艾可蓝节能环保科技有限公司 Fuel oil combustion control system for concurrent heating regeneration system of diesel engine tail gas particle catcher

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
小型非道路柴油机排气管内颗粒的粒径分布与氧化特性;王忠;孙波;赵洋;瞿磊;赵怀北;李铭迪;;农业工程学报(第10期);全文 *

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